Unify doc-strings (remove type/rtype)

As this information is already provided in type hints and we don't need to maintain it in two places.

src/ifcopenshell-python/ifcopenshell/api/pset/add_qto.py

@@ -50,15 +50,12 @@ def add_qto(file: ifcopenshell.file, product: ifcopenshell.entity_instance, name
     metadata, rather than quantification data.
 
     :param product: The IfcObject that you want to assign a quantity set to.
-    :type product: ifcopenshell.entity_instance
     :param name: The name of the quantity set. Quantity sets that are
         standardised by buildingSMART typically have a prefix of "Qto_",
         like "Qto_WallBaseQuantities". If you create your own, you must not
         use that prefix. It is recommended to use your own prefix tailored
         to your project, company, or local government requirement.
-    :type name: str
     :return: The newly created IfcElementQuantity
-    :rtype: ifcopenshell.entity_instance
 
     Example:
 

src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py

@@ -60,10 +60,8 @@ def edit_pset(
     to ensure that data types are always consistent and correct.
 
     :param pset: The IfcPropertySet to edit.
-    :type pset: ifcopenshell.entity_instance
     :param name: A new name for the property set. If no name is specified,
         the property set name is not changed.
-    :type name: str, optional
     :param properties: A dictionary of properties. The keys must be a string
         of the name of the property. The data type of the value will be
         determined by the property set template. If no property set
@@ -73,18 +71,14 @@ def edit_pset(
         become IfcBoolean, and integers will become IfcInteger. If more
         control is desired, you may explicitly specify IFC data objects
         directly. Note that provided `properties` might be mutated in the process.
-    :type properties: dict
     :param pset_template: If a property set template is provided, this will
         be used to determine data types. If no user-defined template is
         provided, the built-in buildingSMART templates will be loaded.
-    :type pset_template: ifcopenshell.entity_instance, optional
     :param should_purge: If set as False, properties set to None will be
         left as None but not removed. If set to true, properties set to None
         will actually be removed. The default of true is the same behaviour as
         :func:`ifcopenshell.api.pset.edit_qto`.
-    :type should_purge: bool, optional
     :return: None
-    :rtype: None
 
     Example:
 

src/ifcopenshell-python/ifcopenshell/api/pset/edit_qto.py

@@ -73,7 +73,6 @@ def edit_qto(
     :param pset_template: If a quantity set template is provided, this will
         be used to determine data types. If no user-defined template is
         provided, the built-in buildingSMART templates will be loaded.
-    :type pset_template: ifcopenshell.entity_instance, optional
     :return: None
 
     Example: